expression
please come; please visit
Polite request for someone to come to a place, such as a home or shop. The て-form of いらっしゃる (honorific for 来る) plus ください.
See also: いらっしゃる
ぜひ、うちにいらっしゃってください。
Please do come to our house.
お時間がありましたら、店にいらっしゃってください。
If you have time, please come to the shop.